Scrap Metal

You can pull Scrap Metal out of the water anywhere, since its location is Regionless, and the wiki says it also comes up in Crab Cages. It bites in the Day, no bait is listed, and its low rarity makes the bar an easy ride.

A piece weighs between 1.4 and 6.2 kg and pays 8.09 C$ per kg, so even the heaviest one is worth a little over 50 C$. Among the 24 Trash items it lands mid-table: #12 by top weight, with Brinicle and Bone at 8 kg above it and Bent Harpoon (3) and Boot (2.7) below. Its pay per kg also ranks #12, behind Broken Flashlight (10) and Destroyed Fossil (8.24) and ahead of Honey Clump (5.143) and String (4.444).

The XP is better placed: 20 base XP is #6 of 24 in the group, under Rusty Bolt (30) and Bone (25) and level with Seaweed and Fungal Cluster. The quote is “Just a piece of metal.” and the single catch line is “Just a piece of scrap metal!”